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Finding the Fourth Proportional to 666,485.50, 919,749.99 and 364,679.50

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Solution

The fourth proportional to 666,485.50, 919,749.99 and 364,679.50 is: 503,257.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,485.50 : 919,749.99 = 364,679.50 : x
  2. Step 2: Convert to fraction form
    666,485.50/919,749.99 = 364,679.50/x
  3. Step 3: Cross multiply
    666,485.50x = 919,749.99 × 364,679.50
  4. Step 4: Simplify right side
    666,485.50x = 335,413,966,478.21
  5. Step 5: Solve for x
    x = 335,413,966,478.21/666,485.50
  6. Step 6: Final answer
    x = 503,257.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.